42results about How to "Will not affect the measurement" patented technology

The invention belongs to the field of weighing apparatus metering, relating to an automatic handing device of a three-dimensional weight in quality measurement. The invention discloses an automatic handing system of weight and application thereof. The system comprises the weight, a power control part, a sliding assembly, a flexible assembly and a mechanical arm, wherein the sliding assembly and the flexible assembly are matched to operate under the driving of the power control component so as to control the mechanical arm to transport the weight. The automatic handing system of a three-dimensional weight in high-accuracy quality measurement provided by the invention can conveniently and automatically transport and load cylindrical weight, has compact structure, small occupation space, high transportation and loading speed and high working efficiency, and can automatically adjust speed and realize no-impact loading, thereby bringing great convenience for operating staff to operate, saving manpower.

The invention discloses a device for measuring straightness / coaxiality by applying laser, comprising a first Wollaston prism, a second Wollaston prism and a transitional reflector which are arranged on the measuring light path in sequence, wherein the second Wollaston prism and the first Wollaston prism are positioned on the path of the light which returns after being reflected by the transitional reflector in sequence; the transitional reflector is of plane mirror structure with light path drift adaptation functions in the two mutually vertical directions; and when the incident light enters along the characteristic direction of the transitional reflector, the light which returns after being reflected by the transitional reflector is opposite and parallel to the incident light, and the distance between the light which returns and the incident light is constant. The device ensures the datum to be invariant during measuring the straightness in the horizontal and vertical directions, thus greatly simplifying the adjustment process, shortening the adjustment time and improving the adjustment efficiency.

The invention relates to a preparation method and application of a core-shell type ultra-micro electrode. The core-shell structure ultra-micro electrode is obtained by preparing ultra-micro electrode fibers of a coaxial structure in a one-step mode through a coaxial electrostatic spinning method and then performing packaging. The coaxial structure comprises a core electrode base layer and one or two surface sensing layers. By the adoption of the one-step forming technology, the complex surface modification process of traditional ultra-micro electrodes (such as glassy carbon electrodes obtained after ablation treatment) is omitted, and the ultra-micro electrode with the diameter ranging from 40 nm to 6 micrometers can be prepared; due to the subsequent treatment temperature ranging from 70 DEG C to 150 DEG C, the structures and functions of organic functional components (such as biological protein and enzymes) in a modification layer of the ultra-micro electrode can be easily maintained, which is of great significance for the pluralistic design of the ultra-micro electrode. The ultra-micro electrode is used for detecting adenosine triphosphate (ATP), dopamine and adrenal hormones and is high in response speed and sensitivity, strong in anti-jamming capability and especially suitable for on-line rapid determination, particularly, real-time non-destructive determination of living cells.

The invention discloses a friction force measuring device of ball screws with variable loads. The friction force measuring device comprises a vibration insolating rack, an L-shaped base, a servo motor, a guide spline, a spring, a double-nut ball screw, a shaft coupler, a friction force measuring mechanism and the like. The friction force measuring mechanism comprises two baffles, ten bolts, ten steel balls, a dynamic sensor, a sensor support and a dowel bar. The L-shaped base is fixed on the vibration insolating rack; the ball screw is set up on the L-shaped base with one end fixed and the other end free; the spring is mounted between two nuts; and the measuring device is placed on the guide spline. The invention further provides a corresponding measuring method of the friction force measuring device. Quantificational varying of axial loads of the ball screws can be realized by the aid of the friction force measuring device with internal loads which are remarkably different from that of other operation devices, so that affections of other friction force caused by external loads do not exist, and friction force between rolling bodies of the ball screws and a rolling path can be measured accurately.

A method in a network node for adapting a Secondary cell, SCell, command to a user equipment, UE, is provided. The SCell command is one of a setup and release command. The network node adapts the SCell command by one of advancing and delaying the timing of sending said SCell command with respect to a start of a transmission occasion of disjoint signals on which one of the UE and the network node is performing at least one of a measurement, the disjoint signal is a signal that is not used for performing the measurement in every subframe, a data transmission, the disjoint signal is a signal that is not used for transmitting the data in every subframe, and a data reception, the disjoint signal is a signal that is not used for receiving the data reception in every subframe.

The invention discloses a transformer induced switching impulse voltage generation device triggered by IGBTs. The device comprises an AC power supply, a voltage regulator, a current-limiting resistor, a rectifier module, an IGBT module, a main capacitor and a transformer. The power supply charges the main capacitor through the IGBT module, and the IGBT module is turned on through triggering, so that the main capacitor discharges a primary side of the transformer; a switching impulse voltage is induced on a secondary side and measured by an impulse high-voltage bleeder, the impulse high-voltage bleeder is connected with an oscilloscope through a coaxial cable, and the waveform of the switching impulse voltage is displayed on the oscilloscope. By the adoption of the device, non-oscillating and oscillating switching impulse voltages can be generated; except the transformer and the bleeder, all the other components operate in a low-voltage environment, so that the generated voltage is low in dispersity, disruptive discharge signals are not generated, and the device is applicable to laboratories, especially to field. The device has the advantages of being easy to operate, convenient to move, accurate in waveform and applicable to field measurement and partial discharge measurement.

The invention discloses a measurement specimen and a measurement method for an interface characteristic of an embedded rib reinforced concrete beam. The specimen comprises a combined reinforced rib, wherein a through groove is formed in the center of the section of the combined reinforced rib in the axial direction; strain gauges are uniformly distributed on the inner wall of the through groove along the axial direction of the through groove. The method comprises the following steps that the combined reinforced rib is embedded into the concrete beam, and according to the conventional four-point bending static load test, an automatic static strain acquisition instrument records data epsilon f of the strain gauges and the cracking load Pcr, the yield load Py and the ultimate load Pu of the beam in real time; according to the strain data measured actually, the shearing strength of an interface of the combined reinforced rib or a CFRP rib with a glue agent is obtained by calculation; the Pu theory value is obtained by calculating according to the calculating method of the concrete reinforcing strength in the concrete reinforcing theory. By comparing the errors of the Pu theory value with the Pu, the result shows that the specimen can be used for improving the measurement precision of parameters of the interface characteristic of the reinforced concrete beam, and the strain measurement is convenient and easy.

The invention refers to a heparin compound and its preparation method and application. The heparin compound is a heparin zinc-potassium double salt demonstrated by the formula of R(ZnOH)aKb. The R represents the heparin radical and a is between 3 and 5, b between 1 and 3. The heparin compound can be made through the following preparation method: dissolve the sodium heparin into the water and contact with the cinnamene cation exchange resin to get the heparin solution; add an amount of zinc hydroxide and potassium hydroxide to the heparin solution, whisk and dry it and get the mentioned solid heparin compound. The heparin compound can be used as the anticoagulant agent as well as the main material of the anti thrombus medicine. The heparin zinc-potassium as the anticoagulant agent meets not only the requirements of not affecting the components' balance and stability of the blood samples to be tested but also the requirement of the solubility in the blood. When it is chosen as the main resource of the anti thrombus medicine, the heparin zinc-potassium releases slowly, has long effect of medicine and no toxicity and is good for the zinc-adding of the human body.

The invention discloses a method and a device for allocating a CRS (Cell Reference Signal). The method comprises the following steps of dividing a cell into a center area and an edge area; dividing the CRS into a center CRS, an edge CRS and a public CRS; increasing a fixed first power value on the basis of set reference EPRE (Energy per Resource Element), and allocating the first power value to be an EPRE value of the edge CRS; reducing a fixed second power value on the basis of set reference EPRE, and allocating the second power value to be an EPRE value of the center CRS; and allocating the reference EPRE into the EPRE value of the public CRS. According to the method and the device, disclosed by the invention, the power of the edge CRS of the cell is increased as possible on the premise without affecting the performance of the center CRS, the same frequency interference between the edge area and a neighbor cell channel is reduced, and the downlink function of the edge area of the cell is increased.

The invention provides a calibration system and method for an unmanned aerial vehicle semi-closed-loop control plane. The system comprises a ground control device, a clamp and a calibration box, wherein the calibration box further comprises an MEMS inertial navigation system, a processor module and a wireless communication module; the ground control device is connected with an unmanned aerial vehicle through a cable, a control command is sent to the unmanned aerial vehicle, and the unmanned aerial vehicle control plane is controlled to swing up and down; the calibration box is clamped to the rear edge of the wing surface of the unmanned aerial vehicle through the clamp and moves along with the wing surface; the MEMS inertial navigation system is used for measuring the rotation angle of thewing surface; the processor module is used for converting the wing surface rotation angle information measured by the MEMS inertial navigation system into a quaternion, and the wing surface rotationangle information is provided for the ground control device through the wireless communication module so as to calibrate the unmanned aerial vehicle semi-closed-loop control plane. The system has no requirement for the fixing position of the system relative to the control plane, so that the application range is wide, and the operability is high; the control plane angular position and control planerotating shaft factors are separated, so that calibration of the control plane rotating motion is relatively convenient.

The invention provides an MRI (Magnetic Resonance Imaging) gradient coil assembling platform and assembling method. The MRI gradient coil assembling platform comprises a bearing structure I, a bearing structure II, a bottom installation platform, an X and Y adjustment table, a rotary adjustment table and Z-direction oblique adjustment bolts, wherein the bottom installation platform is in a circular ring shape; two circles of support pillars are respectively arranged inside and outside the circular ring part and are respectively inner layer support pillars and outer layer support pillars; the inner layer support pillars support the bearing structure I; the outer layer support pillars support the circular ring-shaped bearing structure II; the circular ring-shaped rotary adjustment table is arranged on the bearing structure II; the circular ring-shaped X and Y adjustment table is arranged on the rotary adjustment table; the bearing structure I is arranged in the circular ring-shaped X and Y adjustment table; a plurality of Z-direction oblique adjustment bolts are uniformly arranged on the bottom part of the bearing structure II. The platform can realize rotary, inclination and translation of a gradient coil module, and meets the requirement of gradient coil assembling; due to the use of the method, the assembling efficiency of coils is improved, the process cost is reduced, and the product performance is improved.

The invention provides a method for measuring refractive index of a microsphere or a medium. The method comprises the following steps of: imaging the microsphere immersed in the medium with lower refractive index under parallel light irradiation; measuring the ratio of the radius R of a microsphere image to the radius r of the central bright round of the microsphere image; accurately measuring the refractive index of the microsphere under the condition of knowing the refractive index of the medium; and accurately measuring the refractive index of the medium under the condition of knowing the refractive index of the microsphere, wherein the microsphere is an optically transparent mini sphere and the medium is an optically transparent substance. The method is simple and convenient, and easy to operate. The relative refractive index can be obtained only by shooting the image of the microsphere, measuring the ratio of the radius r of the central bright round of the microsphere image to the radius R of the microsphere, and using an equation (A). The method can be used for measuring the refractive index or the concentration or the temperature change of the mixed fluid at different special points, the refractive index of a phase change critical point or the dynamic change of concentration distribution, the molecular structure and the concentration change or the temperature change in an organism and the like.

The invention discloses a distance measurement instrument. The distance measurement instrument comprises a shell, a transmitting mechanism and a receiving mechanism, which are arranged on the shell, and a light-transmitting shielding part, wherein the transmitting mechanism is provided with a transmitting channel; the light-transmitting shielding part is positioned in front of the transmitting channel and located in the shell, and has a certain inclination angle relative to the transmitting direction. The distance measurement instrument has a simple structure, and as the light-transmitting shielding part has a certain inclination angle relative to the transmitting direction, reflecting light and stray light cannot be directly reflected on a receiving assembly, and thus the measurement precision is greatly improved.

According to the invention, a lift cabin is equipped with a detector (11) that records the speed of the cabin, said detector comprising a unit (13) that identifies an excess speed and that electrically controls a braking device. The aim of the invention is to ensure the reliable detection of the speed of the lift cabin. To achieve this, in order to determine said speed, two rollers (9) are provided on a guide track (2). The speed of each roller (9) is recorded independently by detectors (11) and the unit (13) triggers an emergency braking procedure, if one of the detectors (11) indicates an excess speed. The two rollers (9) can be mounted to pivot on a rocker bar (10) on either side of the guide track (2), the rocker bar (10) being eccentrically pre-tensioned by a spring (15). The invention also relates to a method, according to which the actuating force for the braking device can be mechanically increased with the aid of the rollers.

The invention discloses a fertilization system adaptive to different element replenishments on the basis of soil researches. The fertilization system comprises a bottom plate, wherein the top of the bottom plate is fixedly connected with a box body; a partition box is fixedly connected to the left side of the inner wall of the box body; a potassium fertilizer box, a nitrogen fertilizer box and a phosphorus fertilizer box are sequentially arranged at the top of the inner wall of the box body from left to right, and a bottom box is arranged on one side at the bottom of the inner wall of the boxbody; the top of the bottom box is communicated with three transitional boxes, and the tops of the three transitional boxes are respectively communicated with the potassium fertilizer box, the nitrogen fertilizer box and the phosphorus fertilizer box through communicating pipes. The invention relates to the technical field of soil researches. According to the fertilization system adaptive to different element replenishments on the basis of soil researches, the detection is very convenient, the result providing time can be shortened, the detecting efficiency is improved, manual adjustment is not required, the data accuracy is ensured, and errors are less. Therefore, soil and crops are enabled to be in an appropriate environment, unnecessary waste is reduced, and the work efficiency is improved.

The invention discloses a diffuse reflection spectrum detection device. The device comprises a sample real-time measurement light path, a background spectrum calibration light path, a wavelength calibration light path, a light path switching device and a spectrograph, wherein the sample real-time measurement light path, the background spectrum calibration light path and the wavelength calibrationlight path are subjected to light path switching through the light path switching device; and the light is transmitted to a spectrograph through an optical fiber for spectroscopic detection. Accordingto the device the calibration light source and the detection light source are arranged at a short distance, so that the preheating time of the calibration light source can be reduced, the wavelengthcalibration time is shortened, the service life of the calibration light source is prolonged, stability of the internal temperature of the instrument is ensured, and accuracy of a measured value of asample is not influenced by wavelength calibration.

The invention provides a double-marble balanced centering type internal dial gauge. The double-marble balanced centering type internal dial gauge comprises a measuring part, an ejector pin part and a master meter, wherein the ejector pin part comprises a main gear, a main shaft, an ejector pin, a volute spring, a lower end cover and a sleeve, the main gear is arranged at the bottom of the main shaft, the ejector pin is arranged between a main shaft sealing cover and the upper end surface of the main shaft, the master meter is fixed at the side end of a fixed ring through a fixed support, the lower end cover is arranged below the volute spring which is fixed below the main gear, the measuring part comprises a lower box, an upper box, two inner measuring rod sleeves and two inner measuring rods, one ends of the inner measuring rods are inserted in through holes of inserting parts of the inner measuring rod sleeves, and the end parts of the two inner measuring rods extend out of the two sides of the lower box and the upper box. The double-marble balanced centering type internal dial gauge has the advantages that the defect of incapability of centering in short time during earlier stage balanced centering is overcome, and a dead zone in a variable orifice is visible, so that whether a dial gauge stand is balanced and centered and whether the measurement state is achieved can be judged through direct visual observation, the measurement time is shortened as much as possible, and the measuring accuracy is improved.

The invention discloses a hosiery knitter detection and adjustment method and a detection and adjustment device thereof. The detection and adjustment method comprises the steps that a weighing box isweighed, then the weighing box containing socks is weighed, the weight of the socks is calculated and compared with the weight of qualified socks, the height of an initial needle cylinder in a hosieryknitter is automatically adjusted, and meanwhile a controller can automatically pour out the socks in the weighing box. The detection and adjustment device comprises a detection device arranged belowa sock outlet of the hosiery knitter and an adjustment device fixed in the hosiery knitter, wherein the detection device comprises a rack, a clamping piece is connected to the rack, the weighing boxis arranged in the clamping piece, and a liftable electronic scale is fixed to the position, under the weighing box, of the rack. According to the method and the device, the labor intensity of workerscan be reduced, and the advantages of being high in detection precision, low in production cost, convenient in adjustment, capable of not reducing the working efficiency of the hosiery knitter, capable of giving an adjustment limit alarm, capable of giving an alarm for mistakenly replacing yarn bobbins and convenient in sock discharging are achieved.

A method in a network node for adapting a secondary cell SCell order to a user equipment UE is provided. SCell commands are setup or release commands. The UE is a UE supporting multiple carriers. The network node adjusts (302) the SCell command by advancing or delaying the timing of sending said SCell command with respect to the start of transmission occasions of disjoint signals for which the UE or the network node is performing at least one of the following, measuring , where disjoint signals are signals that are not used to perform measurements in every subframe; data transmission, where disjoint signals are signals that are not used to send data in every subframe; and data reception, where disjoint signals is a signal that is not used to receive data in every subframe.

The invention discloses a Bitobar flowmeter which comprises a pipeline section and a sensor inserted into the pipeline section. The sensor comprises a straight hexahedron-shaped pressure obtaining head, a full-pressure guide square pipe and a static-pressure guide square pipe which are in sealed connection with the upper end and the lower end of the straight hexahedron-shaped pressure obtaining head. The straight hexahedron-shaped pressure obtaining head is provided with a full-pressure half hole and a static-pressure half hole which are formed in the left side and the right side of the upper and lower axes of the straight hexahedron-shaped pressure obtaining head and are communicated with the full-pressure guide square pipe and the static-pressure guide square pipe respectively. The left side and the right side of the straight hexahedron-shaped pressure obtaining head are correspondingly provided with a full-pressure hole and a static-pressure hole which are communicated with the full-pressure half hole and the static-pressure half hole respectively. The upper end of the full-pressure guide square pipe and the lower end the static-pressure guide square pipe are provided with an upper end cover and a lower end cover respectively. The upper end cover and the lower end cover are provided with a full-pressure connector and a static-pressure connector respectively. When low-speed gas flow in a pipeline is measured, large pressure will be produced on the incident flow face of the pressure obtaining head, small pressure is produced on the exit flow face of the pressure obtaining head, the extracted full-pressure and static-pressure difference is large, and therefore a measuring result is more accurate.

The present invention relates to the field of the resonant magnetic coupling-based wireless energy transmission and concentration detection technology and particularly relates to a resonant magnetic coupling-based nondestructive solution concentration detection device and a detection method. The device comprises a temperature monitoring and controlling apparatus, a network analyzer connected with a computer, and test equipment connected with the network analyzer. The test equipment comprises a resonant magnetic coupling system. The resonant magnetic coupling system comprises a transmitting end and a receiving end. The device overcomes the defect in the prior art that a solution crystallizes on a conventional sensor and even corrodes the sensor during the concentration measurement process of the solution by means of the conventional sensor. Meanwhile, the defects that due to the anti-corrosion material arranged on the surface of the conventional sensor, the measurement accuracy is greatly affected and the usage of an instrument is therefore influenced are also overcome. A coating is added onto the surface of a resonance coil, so that the solution crystallization and the corrosion are effectively prevented. The long-term measurement is enabled by the resonance coil, and the resonance coil can be drawn out and then cleaned. Therefore, the nondestructive detection of the solution is realized. The device and the method have a good application prospect.

The invention discloses a total station with a rain shielding function, and relates to the field of geographic surveying and mapping equipment.The total station comprises an instrument body, a base arranged at the lower end of the instrument body and a support arranged on the lower surface of the base, and side plates are fixedly connected to the positions, located on the two sides of the instrument body, of the base correspondingly; a mounting plate is fixedly connected to the upper end of the side plate and located above the instrument body, rain shielding cloth used for shielding rainwater for the instrument body is arranged at the two ends of the mounting plate respectively, the rain shielding cloth faces a lens of the instrument body, and a window for lens measurement is formed in the rain shielding cloth. The total station has the effect of reducing the influence of rainwater on the service life of the total station.

The present invention relates to the field of the resonant magnetic coupling-based wireless energy transmission and concentration detection technology and particularly relates to a resonant magnetic coupling-based nondestructive solution concentration detection device and a detection method. The device comprises a temperature monitoring and controlling apparatus, a network analyzer connected with a computer, and test equipment connected with the network analyzer. The test equipment comprises a resonant magnetic coupling system. The resonant magnetic coupling system comprises a transmitting end and a receiving end. The device overcomes the defect in the prior art that a solution crystallizes on a conventional sensor and even corrodes the sensor during the concentration measurement process of the solution by means of the conventional sensor. Meanwhile, the defects that due to the anti-corrosion material arranged on the surface of the conventional sensor, the measurement accuracy is greatly affected and the usage of an instrument is therefore influenced are also overcome. A coating is added onto the surface of a resonance coil, so that the solution crystallization and the corrosion are effectively prevented. The long-term measurement is enabled by the resonance coil, and the resonance coil can be drawn out and then cleaned. Therefore, the nondestructive detection of the solution is realized. The device and the method have a good application prospect.

The invention relates to an intrinsically safe sensing device for multi-parameter detection of oil. The device comprises an immersed sensor assembly and a control box assembly, wherein the immersed sensor assembly comprises a cylindrical housing, a ferromagnetic abrasive particle adsorption head mounted on the front end of the cylindrical housing, a ferromagnetic abrasive particle sensor and a dielectric sensor mounted inside the cylindrical housing, and a temperature sensor attached to the cylindrical housing; the interior of the immersed sensor assembly is integrally potted by a two-component potting sealant, the cylindrical housing adopts an insulating waterproof material, the control box assembly includes a control box, the inner cavity of the control box is mounted with a circuit board, the ferromagnetic abrasive particle sensor, the power supply cables and the detection signal cables of the dielectric sensor and the temperature sensor are all connected to the circuit board, and the internal circuits of the control box and the immersed sensor assembly are both intrinsically safe circuits. The device provided by the invention can simultaneously detect three oil-related parameters of oil abrasive grains, oil temperature and dielectric, and save installation space.

The invention discloses a high-pressure-resistant high-precision temperature sensor. The sensor comprises an outer protection tube, an inner protection tube, a junction box, an insulation support, a plurality of conducting wires and an insulation filler. The junction box is arranged at one end of the outer protection tube; a transmitter is arranged in the junction box; the transmitter is used forconverting a temperature signal into an output signal; the inner protection tube is inserted into the outer protection tube; the inner protection tube extends out of the other end of the outer protection tube to form a detection probe; the insulation support is arranged in the inner protection tube; and the plurality of conducting wires are arranged in the insulating support in an axial directionand are connected with the transmitter, the insulating support and the inner protection tube are isolated through the insulating filler, the conducting wires are provided with resistor bodies used fordetecting temperatures, and the resistor bodies are located at an end portion of the detection probe. The high-pressure-resistant high-precision temperature sensor provided by the invention is high in sensitivity, high in thermal response speed and accurate in detection result.

The invention discloses a shaftless liquid turbine flow meter with a self-powered meter head. The liquid turbine flow meter comprises an outer shell, an inner shell and the meter head, the inner shellis coaxially installed in the outer shell, and a relatively free rotating pair is formed between the inner shell and the outer shell; the outer shell and the inner shell are provided with a first port and a second port which are used for a fluid to flow in and out and are coaxially formed; a shaftless impeller is arranged in the inner shell, and a magnet is arranged on the outer surface of the inner shell; a coil capable of cutting the magnetic induction line of the magnet is arranged in the outer shell, the coil is connected with the interior of the meter head through a wire; the meter headcomprises a conversion circuit, the conversion circuit is used for converting induction current of the coil into a measurable potential and supplying power to the meter head, and the flow of the fluidis measured by measuring the induced current and potential of the coil. The symmetrical shaftless impeller is used, so that the flow direction of the fluid is not limited, the resistance of fluid flowing is reduced, and measurement is more accurate; current generated through electromagnetic induction can also supply power to the meter head, and an external power source does not need to be added to the meter head.

The invention discloses a method for trace detection of mercury ions. The method utilizes a surface-enhanced Raman scattering method and comprises immersing copper sulfide shell-coated gold nanoparticles in a mercury ion solution for at least 5min, carrying out solid-liquid separation treatment to obtain a product, and measuring reaction-enriched mercury on the product as a surface-enhanced Ramanscattering active substrate through a laser Raman spectrometer, wherein the gold nanoparticles have sizes of 10-200nm, the copper sulfide shell has thickness of 0.6-25nm, the immersion time is in a range of 5-120min, the solid-liquid separation treatment is centrifugal separation or filtering separation, a rotation rate is 3000-7000r / min in the centrifugal separation, the centrifugal separation time is 3-7min, the excitation wavelength of the laser Raman spectrometer is 532nm or 633nm or 785nm, the output power is 0.1-25mW / micron<2> and the integration time is 1-20s. The method can be widely and commercially used for real-time trace detection of mercury ions in water.

The invention discloses a combined gear oil stirring experiment device, which comprises a box body, a box cover arranged on the box body, bearing seats arranged on both sides of the box body, and a spline ladder fixed on the bearing seats through bearings at both ends shaft, a splined disk is fixed on the splined stepped shaft, and a splined gear assembly or a splined wheel assembly is set outside the splined disk; the splined gear assembly includes at least one external gear ring, when the external gear ring When the number is ≥ two, an inner gear ring is fitted between two adjacent outer gear rings; the spline wheel assembly includes at least one pair of outer gear rings and inner gear rings, and the outer gear rings and inner gear rings are sequentially arranged from inside to outside Arranged at intervals; at the same time, one end of the splined stepped shaft is connected to the speed torque sensor 1 and the drive motor, and the other end of the splined stepped shaft is connected to the speed torque sensor 2 and the dynamometer motor; the advantage of the present invention is that it is easy to install and replace Gears or discs with different diameters, modulus, and number of teeth can achieve accurate axial displacement positioning.